mirror of
https://github.com/jquery/jquery.git
synced 2024-11-23 02:54:22 +00:00
The AJAX plugin is now fully documented, along with some bug fixes and new features.
This commit is contained in:
John Resig
parent
37c237af35
commit
70cab836b0
433
ajax/ajax.js
433
ajax/ajax.js
@ -2,45 +2,131 @@
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// Docs Here:
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// http://jquery.com/docs/ajax/
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if ( typeof XMLHttpRequest == 'undefined' && typeof window.ActiveXObject == 'function') {
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XMLHttpRequest = function() {
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return new ActiveXObject((navigator.userAgent.toLowerCase().indexOf('msie 5') >= 0) ?
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"Microsoft.XMLHTTP" : "Msxml2.XMLHTTP");
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};
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/**
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* Load HTML from a remote file and inject it into the DOM
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*/
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$.fn.load = function( url, params, callback ) {
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// I overwrote the event plugin's .load
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// this won't happen again, I hope -John
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if ( url && url.constructor == Function )
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return this.bind("load", url);
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// Default to a GET request
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var type = "GET";
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// If the second parameter was provided
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if ( params ) {
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// If it's a function
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if ( params.constructor == Function ) {
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// We assume that it's the callback
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callback = params;
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params = null;
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// Otherwise, build a param string
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} else {
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params = $.param( params );
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type = "POST";
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}
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}
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// Counter for holding the active query's
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var self = this;
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// Request the remote document
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$.ajax( type, url, params,function(res){
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// Inject the HTML into all the matched elements
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self.html(res.responseText).each(function(){
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// If a callback function was provided
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if ( callback && callback.constructor == Function )
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// Execute it within the context of the element
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$.apply( self, callback, [res.responseText] );
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});
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// Execute all the scripts inside of the newly-injected HTML
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$("script", self).each(function(){
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eval( this.text || this.textContent || this.innerHTML || "");
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});
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});
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return this;
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};
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/**
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* Load a remote page using a GET request
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*/
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$.get = function( url, callback, type ) {
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// Build and start the HTTP Request
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$.ajax( "GET", url, null, function(r) {
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if ( callback ) callback( $.httpData(r,type) );
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});
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};
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/**
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* Load a remote page using a POST request.
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*/
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$.post = function( url, data, callback, type ) {
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// Build and start the HTTP Request
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$.ajax( "POST", url, $.param(data), function(r) {
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if ( callback ) callback( $.httpData(r,type) );
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});
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};
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// If IE is used, create a wrapper for the XMLHttpRequest object
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if ( $.browser == "msie" )
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XMLHttpRequest = function(){
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return new ActiveXObject(
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(navigator.userAgent.toLowerCase().indexOf('msie 5') >= 0) ?
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"Microsoft.XMLHTTP" : "Msxml2.XMLHTTP"
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);
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};
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// Counter for holding the number of active queries
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$.xmlActive = 0;
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$.xml = function( type, url, data, ret ) {
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// Attach a bunch of functions for handling common AJAX events
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(function(){
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var e = ['ajaxStart','ajaxComplete','ajaxError','ajaxSuccess'];
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for ( var i = 0; i < e.length; i++ ){ (function(){
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var o = e[i];
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$.fn[o] = function(f){return this.bind(o, f);};
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})();}
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})();
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/**
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* A common wrapper for making XMLHttpRequests
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*/
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$.ajax = function( type, url, data, ret ) {
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// If only a single argument was passed in,
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// assume that it is a object of key/value pairs
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if ( !url ) {
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ret = type.onComplete;
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var onSuccess = type.onSuccess;
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var onError = type.onError;
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ret = type.complete;
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var success = type.success;
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var error = type.error;
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data = type.data;
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url = type.url;
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type = type.type;
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}
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// Create the request object
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var xml = new XMLHttpRequest();
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if ( xml ) {
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// Open the socket
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xml.open(type || "GET", url, true);
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// Set the correct header, if data is being sent
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if ( data )
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xml.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
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// Set header so calling script knows that it's an XMLHttpRequest
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xml.setRequestHeader('X-Requested-With', 'XMLHttpRequest');
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/* Borrowed from Prototype:
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* Force "Connection: close" for Mozilla browsers to work around
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* a bug where XMLHttpReqeuest sends an incorrect Content-length
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* header. See Mozilla Bugzilla #246651.
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*/
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// Make sure the browser sends the right content length
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if ( xml.overrideMimeType )
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xml.setRequestHeader('Connection', 'close');
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// Wait for a response to come back
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xml.onreadystatechange = function(){
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// Socket is openend
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if ( xml.readyState == 1 ) {
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@ -48,8 +134,8 @@ $.xml = function( type, url, data, ret ) {
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$.xmlActive++;
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// Show loader if needed
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if ( ($.xmlActive >= 1) && ($.xmlCreate) )
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$.xmlCreate();
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if ( $.xmlActive >= 1 && $.xmlCreate )
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$.event.trigger( 'ajaxStart' );
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}
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// Socket is closed and data is available
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@ -58,284 +144,69 @@ $.xml = function( type, url, data, ret ) {
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$.xmlActive--;
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// Hide loader if needed
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if ( ($.xmlActive <= 0) && ($.xmlDestroy) ) {
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$.xmlDestroy();
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if ( $.xmlActive <= 0 && $.xmlDestroy ) {
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$.event.trigger( 'ajaxComplete' );
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$.xmlActive = 0
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}
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if ( ( xml.status && ( xml.status >= 200 && xml.status < 300 ) || xml.status == 304 ) ||
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!xml.status && location.protocol == 'file:' ) {
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if ( onSuccess )
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onSuccess( xml );
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} else if ( onError ) {
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onError( xml );
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// Make sure that the request was successful
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if ( $.httpSuccess( xml ) ) {
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// If a local callback was specified, fire it
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if ( success ) success( xml );
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// Fire the global callback
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$.event.trigger( 'ajaxSuccess' );
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// Otherwise, the request was not successful
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} else {
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// If a local callback was specified, fire it
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if ( error ) error( xml );
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// Fire the global callback
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$.event.trigger( 'ajaxError' );
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}
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// Process result
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if ( ret )
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ret(xml);
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if ( ret ) ret(xml);
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}
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};
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xml.send(data)
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}
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// Send the data
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xml.send(data);
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};
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// Determines if an XMLHttpRequest was successful or not
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$.httpSuccess = function(r) {
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return ( r.status && ( r.status >= 200 && r.status < 300 ) ||
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r.status == 304 ) || !r.status && location.protocol == 'file:';
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};
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// Get the data out of an XMLHttpRequest
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$.httpData = function(r,type) {
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return r.getResponseHeader("content-type").indexOf("xml") > 0 || type == "xml" ?
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r.responseXML : r.responseText;
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};
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$.get = function( url, ret, type ) {
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$.xml( "GET", url, null, function(r) {
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if ( ret ) { ret( $.httpData(r,type) ); }
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});
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};
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$.getXML = function( url, ret ) {
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$.get( url, ret, "xml" );
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};
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$.post = function( url, data, ret, type ) {
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$.xml( "POST", url, $.param(data), function(r) {
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if ( ret ) { ret( $.httpData(r,type) ); }
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});
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};
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$.postXML = function( url, data, ret ) {
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$.post( url, data, ret, "xml" );
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// Check the headers, or watch for a force override
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return r.getResponseHeader("content-type").indexOf("xml") > 0 ||
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type == "xml" ? r.responseXML : r.responseText;
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};
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// Serialize an array of form elements or a set of
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// key/values into a query string
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$.param = function(a) {
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var s = [];
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if (a && typeof a == 'object' && a.constructor == Array) {
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for ( var i=0; i < a.length; i++ ) {
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s[s.length] = a[i].name + "=" + encodeURIComponent( a[i].value );
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}
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} else {
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for ( var j in a ) {
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s[s.length] = j + "=" + encodeURIComponent( a[j] );
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}
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}
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// If an array was passed in, assume that it is an array
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// of form elements
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if ( a.constructor == Array )
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// Serialize the form elements
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for ( var i = 0; i < a.length; i++ )
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s.push( a[i].name + "=" + encodeURIComponent( a[i].value ) );
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// Otherwise, assume that it's an object of key/value pairs
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else
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// Serialize the key/values
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for ( var j in a )
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s.push( j + "=" + encodeURIComponent( a[j] ) );
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// Return the resulting serialization
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return s.join("&");
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};
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$.fn.load = function(a,o,f) {
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// Arrrrghhhhhhhh!!
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// I overwrote the event plugin's .load
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// this won't happen again, I hope -John
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if ( a && a.constructor == Function ) {
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return this.bind("load", a);
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}
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var t = "GET";
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if ( o && o.constructor == Function ) {
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f = o;
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o = null;
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}
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if (typeof o !== 'undefined') {
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o = $.param(o);
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t = "POST";
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}
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var self = this;
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$.xml(t,a,o,function(res){
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// Assign it and execute all scripts
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self.html(res.responseText).find("script").each(function(){
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try { eval( this.text || this.textContent || this.innerHTML || ""); } catch(e){}
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});
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// Callback function
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if (f && f.constructor == Function)
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f(res.responseText);
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});
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return this;
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};
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/**
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* Initial frontend function to submit form variables. This function
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* is for registering coordinates, in the case of an image being used
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* as the submit element, and sets up an event to listen and wait for
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* a form submit click. It then calls any following chained functions
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* to actually gather the variables and submit them.
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*
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* Usage examples, when used with getForm().putForm():
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*
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* 1. Just eval the results returned from the backend.
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* $('#form-id').form();
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*
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* 2. Render backend results directly to target ID (expects (x)HTML).
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* $('#form-id').form('#target-id');
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*
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* 3. Submit to backend URL (form action) then call this function.
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* $('#form-id').form(post_callback);
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*
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* 4. Load target ID with backend results then call a function.
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* $('#form-id').form('#target-id', null, post_callback);
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*
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* 5. Call a browser function (for validation) and then (optionally)
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* load server results to target ID.
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* $('#form-id').form('#target-id', pre_callback);
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*
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* 6. Call validation function first then load server results to
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* target ID and then also call a browser function.
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* $('#form-id').form('#target-id', pre_callback, post_callback);
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*
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* @param target arg for the target id element to render
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* @param pre_cb callback function before submission
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* @param post_cb callback after any results are returned
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* @return "this" object
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* @see getForm(), putForm()
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* @author Mark Constable (markc@renta.net)
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* @author G. vd Hoven, Mike Alsup, Sam Collett
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* @version 20060606
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*/
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$.fn.form = function(target, pre_cb, post_cb) {
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$('input[@type="submit"],input[@type="image"]', this).click(function(ev){
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this.form.clicked = this;
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if (ev.offsetX != undefined) {
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this.form.clicked_x = ev.offsetX;
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this.form.clicked_y = ev.offsetY;
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} else {
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this.form.clicked_x = ev.pageX - this.offsetLeft;
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this.form.clicked_y = ev.pageY - this.offsetTop;
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}
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});
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this.submit(function(e){
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e.preventDefault();
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$(this).getForm().putForm(target, pre_cb, post_cb);
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return this;
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});
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};
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/**
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* This function gathers form element variables into an array that
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* is embedded into the current "this" variable as "this.vars". It
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* is normally used in conjunction with form() and putForm() but can
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* be used standalone as long as an image is not used for submission.
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*
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* Standalone usage examples:
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*
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* 1. Gather form vars and return array to LHS variable.
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* var myform = $('#form-id').getForm();
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*
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* 2. Provide a serialized URL-ready string (after 1. above).
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* var mystring = $.param(myform.vars);
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*
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* 3. Gather form vars and send to RHS plugin via "this.vars".
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* $('#form-id').getForm().some_other_plugin();
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*
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* @return "this" object
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* @see form(), putForm()
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* @author Mark Constable (markc@renta.net)
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* @author G. vd Hoven, Mike Alsup, Sam Collett
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* @version 20060606
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*/
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$.fn.getForm = function() {
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var a = [];
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var ok = {INPUT:true, TEXTAREA:true, OPTION:true};
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$('*', this).each(function() {
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if (this.disabled || this.type == 'reset' || (this.type == 'checkbox' && !this.checked) || (this.type == 'radio' && !this.checked))
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return;
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if (this.type == 'submit' || this.type == 'image') {
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if (this.form.clicked != this)
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return;
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if (this.type == 'image') {
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if (this.form.clicked_x) {
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a.push({name: this.name+'_x', value: this.form.clicked_x});
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a.push({name: this.name+'_y', value: this.form.clicked_y});
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return;
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}
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}
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}
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if (!ok[this.nodeName.toUpperCase()])
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return;
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var par = this.parentNode;
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var p = par.nodeName.toUpperCase();
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if ((p == 'SELECT' || p == 'OPTGROUP') && !this.selected)
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return;
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var n = this.name || par.name;
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if (!n && p == 'OPTGROUP' && (par = par.parentNode))
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n = par.name;
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if (n == undefined)
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return;
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a.push({name: n, value: this.value});
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});
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this.vars = a;
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return this;
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}
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/**
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* Final form submission plugin usually used in conjunction with
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* form() and getForm(). If a second argument is a valid function
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* then it will be called before the form vars are sent to the
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* backend. If this pre-submit function returns exactly "false"
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* then it will abort further processing otherwise the process
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* will continue according to the first and third arguments.
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*
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* If the first argument is a function, and it exists, then the form
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* values will be submitted and that callback function called. If
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* the first argument is a string value then the "load()" plugin
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* will be called which will populate the innerHTML of the indicated
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* element and a callback will be called if there is third argument.
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* If there are no arguments then the form values are submitted with
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* an additional variable (evaljs=1) which indicates to the backend
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* to to prepare the returned results for evaluation, ie; the result
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* needs to be valid javascript all on a single line.
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*
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* Usage example:
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*
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* $.fn.myvars = function() {
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* this.vars = [];
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* for (var i in this) {
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* if (this[i] instanceof Function || this[i] == null) continue;
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* this.vars.push({name: i, value: this[i].length});
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* }
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* return this;
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* }
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*
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* precb = function(vars) {
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* return confirm('Submit these values?\n\n'+$.param(vars));
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* }
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*
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* $('*').myvars().putForm('#mytarget',precb,null,'myhandler.php');
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*
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* @param target arg for the target id element to render
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* @param pre_cb callback function before submission
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* @param post_cb callback after any results are returned
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* @param url form action override
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* @param mth form method override
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* @return "this" object
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* @see form(), getForm(), load(), xml()
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* @author Mark Constable (markc@renta.net)
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* @author G. vd Hoven, Mike Alsup, Sam Collett
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* @version 20060606
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*/
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$.fn.putForm = function(target, pre_cb, post_cb, url, mth) {
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if (pre_cb && pre_cb.constructor == Function)
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if (pre_cb(this.vars) === false)
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return;
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var f = this.get(0);
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var url = url || f.action || '';
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var mth = mth || f.method || 'POST';
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if (target && target.constructor == Function) {
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$.xml(mth, url, $.param(this.vars), target);
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} else if (target && target.constructor == String) {
|
||||
$(target).load(url, this.vars, post_cb);
|
||||
} else {
|
||||
this.vars.push({name: 'evaljs', value: 1});
|
||||
$.xml(mth, url, $.param(this.vars), function(r) { eval(r.responseText); });
|
||||
}
|
||||
|
||||
return this;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user